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Chemistry Test 86
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Chemistry Test 86

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  • Question 1/10
    4 / -1

    Match the column

    Column-I
    (Reduction process)    		 Column-II
    (Charge required)
    (a) 1 mole of MnO4– to Mn2+ (p) 193000 C
    (b) 1 mole of Cr2O72–  to Cr3+ (q) 289500 C
    (c) 1 mole of Sn4+ to Sn2+ (r) 482500 C
    (d) 1 mole of Al3+ to Al (s) 579000 C
  • Question 2/10
    4 / -1

    In the electrolysis of AgNO3, the mass of Ag deposited is plotted against the charge :-

    Slope of the line gives :-

  • Question 3/10
    4 / -1

    A fuel cell develops an electrical potential from the combustion of butane at 1 bar and 298 K

    C4H10(g) + 6.5O2(g) → 4CO2(g) + 5H2O(ℓ); 

     = –2746 kJ/mol

    What is E° of a cell ?

    Solutions

    To find n we break the cell reaction into two half cell reduction

    Anode : 13H2O(l) → 6.5O2(g) + 26H+(aq.) + 26e–            

    Cathode :  4CO2(g) + 26H+(aq.) + 26e– → C4H10(g) + 8H2O(ℓ)

     

  • Question 4/10
    4 / -1

    Which of the following correct composition of dolomite and calamine respectively :

  • Question 5/10
    4 / -1

    Sometime it is possible to seprate two sulphide ore by adjusting proportion of oil to water by using:

  • Question 6/10
    4 / -1

    In cyanide process oxygen act as :-
    Ag2S + 4NaCN  Na2SO4 + 2Na[Ag(CN)2]

  • Question 7/10
    4 / -1

    Aluminothermite process Al used because :

  • Question 8/10
    4 / -1

    Identify element reduced by self reduction :-

  • Question 9/10
    4 / -1

    Match the following :-

    (A) Distillation                       (i) Ni

    (B) Zone refining                  (ii) Zr            

    (C) Mond process                (iii) Hg

  • Question 10/10
    4 / -1

     

    In pig Iron and cast iron carbon contant respectively :-

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